基于反距离权重插值法的抽水型水库水质空间分布分析
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摘要
抽水型水库的运行方式和水动力特征决定了其在上水时和不上水时水质空间分布的差异性,采用反距离权重插值法对水洞沟水库的水质进行空间分布研究。结果表明:上水时,进水口附近的化学需氧量(CODCr)质量浓度超过Ⅲ类水体的标准限值(20 mg/L);全库区总氮(TN)的质量浓度亦超过Ⅲ类水体的标准限值1.0 mg/L;不上水时,由于水体自净作用,污染物质量浓度比上水时降低,仅在取水口附近总氮(TN)出现超标现象。插值结果使得水质空间分布特征更具全面性,为分时段分区域进行库区的污染物控制提供参考。
The operation mode and hydrodynamic characteristics determine the difference of spatial distribution of water quality when inflow and no-inflow in a pumped storage reservoir. The inverse distance weighted interpolation is adopted to study the spatial distribution of water quality in Shuidonggou reservoir. The results show that CODCrconcentration in area near inlet is more than class Ⅲ water standard limitation of 20 mg/L. All of the TN concentrations are more than class Ⅲstandard limitation of 1.0 mg/L. Due to the water self-purification, pollutant concentration is lower in no-inflow phase than in inflow phase. However, only near the inlet, the concentration of TN exceeds limitation. The interpolation results creat more comprehensive spatial distribution characteristics of water quality, which will provide the reference for pollution control in different period and different area of a pumped storage reservoir.
The operation mode and hydrodynamic characteristics determine the difference of spatial distribution of water quality when inflow and no-inflow in a pumped storage reservoir. The inverse distance weighted interpolation is adopted to study the spatial distribution of water quality in Shuidonggou reservoir. The results show that CODCrconcentration in area near inlet is more than class Ⅲ water standard limitation of 20 mg/L. All of the TN concentrations are more than class Ⅲstandard limitation of 1.0 mg/L. Due to the water self-purification, pollutant concentration is lower in no-inflow phase than in inflow phase. However, only near the inlet, the concentration of TN exceeds limitation. The interpolation results creat more comprehensive spatial distribution characteristics of water quality, which will provide the reference for pollution control in different period and different area of a pumped storage reservoir.
引文
[1]郑兰香.宁夏典型抽水型水库水质评价及模拟预测研究[D].银川:宁夏大学,2017.
[2]王显红.大气环境与人群健康评价中的几种GIS空间插值方法的研究[D].重庆:重庆医科大学,2000.
[3]卢进登,帅方敏,梁雄兵,等.空间插值法在湖泊水污染现状评价中的应用研究[J].湖南科技大学学报:自然科学版,2007,22(3):125-128.
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[5]孙惠玲,廖泽波,段立曾,等.基于空间插值算法的阳宗海夏季水质参数空间分布规律研究[J].长江科学院院报,2017,34(3):30-34.
[6]朱求安,张万昌,余钧辉.基于GIS的空间插值方法研究[J].江西师范大学学报:自然科学版,2004,28(2):183-188.
[2]王显红.大气环境与人群健康评价中的几种GIS空间插值方法的研究[D].重庆:重庆医科大学,2000.
[3]卢进登,帅方敏,梁雄兵,等.空间插值法在湖泊水污染现状评价中的应用研究[J].湖南科技大学学报:自然科学版,2007,22(3):125-128.
[4]帅方敏,卢进登,王新生.基于GIS空间插值方法的长湖水质评价[J].环境监测管理与技术,2007,19(4):40-42.
[5]孙惠玲,廖泽波,段立曾,等.基于空间插值算法的阳宗海夏季水质参数空间分布规律研究[J].长江科学院院报,2017,34(3):30-34.
[6]朱求安,张万昌,余钧辉.基于GIS的空间插值方法研究[J].江西师范大学学报:自然科学版,2004,28(2):183-188.